2 pin connector -> 3 pin connector

I just bought a few Panaflo L1A's to replace my stock case fans, but my old case fans had 3 pin connectors, and the Panalos have 2 pin connectors. My problem is that the connectors on my motherboard and the connectors on my 3-4pin adapters are made for 3pin connectors, so the 2 pin connectors don't fit (the two little protrusions on the back of the fan connectors get in the way of the guide on one side of the fan connector on the motherboard, if that makes any sense. Is there any way to use the 2 pin connectors with the three pin connectors on the motherboard? or will I have to cut those guides off to the two pin connectors will fit? Thanks.

Hmm, I would just cut the little glides off.